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Abstract Detail

Diversity and Development in the Vitaceae - More than Wine Grapes

Gerrath, Jean [1].

Inflorescence Architecture—not always like Vitis.

The morphology, physiology, and anatomical and molecular development of inflorescences in Vitis have been well studied. Much less is known, however, about inflorescences in the other genera. Leea species are small trees or shrubs with terminal inflorescences that consist of compound cymes. Inflorescences may also form in the axil of the uppermost leaf on the shoot. Most Vitaceae are climbers that utilize unique, leaf-opposed tendrils. The inflorescences share an early ontogenetic pathway with the tendrils, and are thus also typically leaf-opposed. Recent DNA phylogenetic studies have allowed us to examine variations in inflorescence architecture in the Vitaceae. In the Ampelocissus-Vitis-Nothocissus-Pterisanthes clade the inflorescences are leaf-opposed but form a thyrse. In the Parthenocissus-Yua, Ampelopsis-Cissus striata-Rhoicissus, and Cissus clades the inflorescences are leaf-opposed and consist of compound cymes. Inflorescences also consist of compound cymes in the Cayratia-Cyphostemma-Tetrastigma clade, but arise in either a terminal or axillary position. The terminal position occurs in species that lack tendrils, and the axillary inflorescences arise as a series of bract-opposed compound cymes on a compressed axillary reproductive shoot. The relationships among these different inflorescences types will be discussed utilizing both mature pattern and developmental information.

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1 - University of Guelph, Molecular and Cellular Biology, Guelph, ON, N1G 2W1, CANADA


Presentation Type: Symposium or Colloquium Presentation
Session: SY07
Location: Prince of Wales/Riverside Hilton
Date: Tuesday, July 30th, 2013
Time: 2:45 PM
Number: SY07004
Abstract ID:182
Candidate for Awards:None

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